Materials Literature
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Graphane is a two-dimensional system consisting of a single layer of fully saturated (sp(3) hybridization) carbon atoms. In an ideal graphane structure C-H bonds exhibit an alternating pattern (up and down with relation to the plane defined by the carbon atoms). In this work we have investigated, using ab initio and r…
Based on the five-orbital model, we study the effect of local impurity in iron pnictides, and find that the interband impurity scattering is promoted by the d-orbital degree of freedom. This fact means that the fully gapped sign-reversing s-wave state, which is predicted by spin fluctuation theories, is very fragile a…
The development of cost-effective and low-temperature synthesis techniques for the growth of high-quality zinc oxide thin films is paramount for fabrication of ZnO-based optoelectronic devices, especially ultraviolet (UV)-light-emitting diodes, lasers and detectors. We demonstrate that the properties, especially UV em…
In this work, we report on a single ZnO nanowire-based nanoscale sensor fabricated using focused ion beam (FIB/SEM) instrument. We studied the diameter dependence of the gas response and selectivity of ZnO nanowires (NWs) synthesized by chemical vapor phase growth method. The photoluminescence (PL) measurements were u…
ADVERTISEMENT RETURN TO ISSUEPREVReviewNEXTPolymer Brushes via Surface-Initiated Controlled Radical Polymerization: Synthesis, Characterization, Properties, and ApplicationsRaphael Barbey, Laurent Lavanant, Dusko Paripovic, Nicolas Schüwer, Caroline Sugnaux, Stefano Tugulu, and Harm-Anton Klok*View Author Information…
Graphene, a two-dimensional monolayer of sp(2)-bonded carbon atoms, has been attracting great interest due to its unique transport properties. One of the promising applications of graphene is as a transparent conductive electrode owing to its high optical transmittance and conductivity. In this paper, we report on an…
We report the metallization of the $\text{Si}(001)2\ifmmode\times\else\texttimes\fi{}1$ surface at elevated temperatures using angle-resolved photoemission spectroscopy (ARPES) and near-edge x-ray absorption fine structure (NEXAFS). A metallic state $({S}_{m})$ over the ${E}_{F}$, which corresponds to the empty $({\en…
Amorphous silicon carbide (SiC) with a stable porous structure was synthesised using a cellulose fibre preform (ash less filter paper) infiltrated with poly(methyl-carbosilane) and heated to 1000°C, first under N 2 and then air. Scanning electron microscopy and Hg porosimetry confirmed the structure and porosity of th…
Individual ZnO wires were deposited on two closely spaced electrodes in a microfluidic channel by using the positive dielectrophoretic (p-DEP) alignment technique. By using the p-DEP technique in the presence of a microfluidic force, efficient and rapid alignment of single wires was achieved; this was a result of spat…
Transparent conductive nanofibrous membranes have been successfully fabricated by sputter-coating a metal (Au, Pd, Pt, Ni, Ag, or Au/Pd alloy) onto a water-soluble-polymer nanofibrous template, followed by the dissolution of the template in a water bath. The size of the conductive nanofibers can be facilely controlled…
A transparent, flexible silicone rubber ([SiO(CH 3 ) 2 ] n ) surface was photochemically modified into a photoluminescent material using a 193 nm ArF excimer laser. The photomodified silicone rubber emitted white light under a 325 nm He–Cd laser or a 375 nm light-emitting diode. The chemical bonding of the photomodifi…
208 mm diameter single crystals are grown by Czochralski method with different growing conditions, and the effects of the ingot cooling on point defect behavior and the shape of the crystal–melt interface are experimentally investigated. In order to obtain various cooling rates of the ingot, cooling-water jacket is ch…
Lead-free single crystals of Na0.5Bi0.5TiO3-BaTiO3 (NBT-BT) system were prepared by Czochralski method and their dielectric and pyroelectric properties have been studied. The results were compared with these for pure NBT. The obtained samples show pure perovskite structure with rhombohedral symmetry at room temperatur…
Abstract Mathematical models of direct internal reforming solid oxide fuel cell (DIR‐SOFC) fueled by methane are developed using COMSOL® software. The benefits of inserting Ni‐catalyst rod in the middle of tubular‐SOFC are simulated and compared to conventional DIR‐SOFC. It reveals that DIR‐SOFC with inserted catalyst…
The purpose of this study was to improve the sensitivity and accuracy of quantitative analysis of polymorphic mixtures. Various techniques such as hand grinding and mixing (in mortar and pestle), air jet milling and ball milling for micronization of particle and mixing were used to prepare binary mixtures. Using these…
High-resolution photoluminescence spectra of Fe:YAG crystals were recorded in the temperature range 10-150 K with different excitation energies, ranging from the band gap energy (6.88 eV) down to selective excitation of Fe(3+) ions (2.40 eV). Iron levels fine structure is found in the zero phonon lines, whose characte…
A(III)B(V) compounds are important for the development of advanced ceramic semiconductor and nanoelectronic materials, solar cell elements, and light-emitting diodes. A series of these group 13-15 compounds of the general formula M(4)Y(4)H(8) (M = B, Al, Ga; Y = N, P, As) has been theoretically studied at the B3LYP/TZ…
Deuterium nuclear magnetic resonance spectroscopy and temperature modulated differential scanning calorimetry (TMDSC) were used to probe the segmental dynamics of methyl-labeled poly(vinyl acetate)- d 3 (PVAc- d 3 ) adsorbed on Cab-O-Sil silica in the presence and absence of a plasticizer, dipropyleneglycol dibenzoate…
From the angel of environment protection, through analysing the properties of three majority types of sizing agent, such as starch(modified starch), PVA(polyvinyl alcohol) and acrylic size, we attempted to compare the sizing performance indices of several different environment protection sizing agents. We also briefly…
Abstract We studied peapods prepared with ferrocene (dicyclopentadienyl iron, Fe(Cp) 2 ) as filling species, which makes CNTs with diameters down to 1.1 nm accessible for filling. Two different single‐wall carbon nanotube (SWCNT) samples with mean diameters of 1.1 nm (HiPco) and 1.6 nm (DIPS) were used. Filling was do…